Extension-table.



E. TYDEN.

EXTENSION TABLE.

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Patented Dec. 27, 1910.

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APPLIOATION FILED 00T. 18, 1909.

Patented 1390.27.1910.

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'UNITED STATES NrAzrENir OFFICE.

.EMIL TYDEN, OF HASTINGS, MICHIGAN. v

EXTENSION-TABLE.

Specification of Letters Patent.

Patented Dee. 27, 1910.

Application filed October 18, 1909. Serial No. 523,330.

To all whom it may concern.'

Be it known that I, EMIL TYDEN, a citizen of the United States, residingat Hastings, in the county of Barry and State of Michigan, have inventednew and useful Improvements in Extension-Tables, of which the followingis a specification, reference being had to the accompanying drawings,forming a part thereof.

The purpose of this invention is to provide an improved construction foran extension table, comprising means for locking the extensible memberstogether at any stage of extension when fully closed up and means foraccommodating for the expansion and contraction of the sections of thetop or the llers interposed in extension, so t-hat on the one hand itshall be always possible to operate the locking device, notwithstandingthe expansion of the sections or the fillers,

and so that on the other hand the parts shall be snugly drawn togethernotwithstanding shrinkage.

It consists of the features of construction shown and described asindicated in the claims.

Figure l is a longitudinal vertical section on the upper portion of anextension table equipped with this invention, showing the table extendedboth as to the supporting member and pedestal. Fig. 2 is a plan view ofthe same with the top part broken out to disclose the locking devices.Fig. 3 is a detail section in the same plane as Fig. 1, showing adifferent position of one of the top-locking devices.

The table illustrated in the drawings comprises the customaryconstruction of table in which the pedestal is divided for extension andin which the top members are movable on the pedestal for extensionwhether or not the pedestal is extended.

1 and 2 are the pedestal members which may be provided with customarymeans for locking them together at close position, the

` `means shown in the drawing being merely a hook, 2, which can bereached from the top of the pedestal when the top members are partlyextended. Each top member carries a hook for engaging the supportingmember, and each'half of the supporting member, or pedestal, is providedwith a separate plate, or engaging device, for coperating with the hookon the corresponding top member.

"The top member, 4, has the hook, 5, pivoted to it for swinging downinto engagement with the engaging plate, 13, on the pedestal halfcorresponding to such top member. The hook, 5, is in position to bereached by the hand of the operator when the top members are spread, andis designed to be operated in this manner only. The hook, 6, upon thetop member, 3, is pivoted to a slide, 7, which is mounted for sliding ina hanger, 8, secured to the top member', 3, and is operated by thc link,9, connected to its outer end and extended to the outer end of thetable, where it is connected to a lever, 10, fulcrumed on the undersideof the top member, 3, the pivotal connection of the link and the leverbeing situated with respect to the lever fulcrum so that the leverswinging from a position at which it depends from its fulcrum up to aposition above horizontal, where it is stopped against the underside ofthe table top, carries the pivotal connection of the link, 9, past thecenter, such move ment being effected against the resistance of a spring12, coiled about the slide, 7, and stopped at one end on the slide andat the other end on the bearing of the slide, reacting for thrusting theslide inward and resisting the outward movement of the lever, 10, thenlocking the device when said lever, 10, is rocked for carrying the pivotof the link, 9, past the center, as stated.

The hook, 6, has a projection, 6, extending upward'near its fulcrum inposition to collide with the inner bearing of the slide on the bracket,8, when the spring, 12, operates to thrust the slide inward; and thataction causes the hook to be lifted out of the engagement with engagingdevice on the supporting member, the. hook falling by gravity into thepath for such engagement when the slide is retracted very slightly fromthe inward position to lwhich it is thrust by the spring 12. Theengaging plates, 13 and 14, on the supporting member are of sameconstruction so far as their means of engagement with the hooks, 5 and6, are concerned. Each of said plates is made of sheet metal with alongitudinal rib, 15b, struck up along the middle of its width, leavinglateral flanges for fastening the plate to the supporting member, thestruckup rib having notches, 16, 16, 16b for engagement of the hooks,the notches, 16, being at position for engagement with the hooks whenthe top members', 3 and 4, are close together, and the other notchesbeing at half filler width intervals outward, so

that the engagement of the hooks may be effected at suitable points foradmitting one or more fillers when each top member is extended equallyfrom middle or closed pesition. The amount of longitudinalmovement-which the slide, 7, receives from the lever 10, when it isrocked about its fulcrum from inner to outer position, is designed to besufiicient to take up the slack which it is necessary to allow for thetenons or other engaging devices which connect the edges of the topmembers and slides, and to provide for tightening the parts together,either at closed position of the top members or when extended withintervening fillers.

When thel pedestal is extended for admission for a larger number offillers than can be admitted by the extension of the top membersrelative to the pedestal, such extension of the pedestal must be limitedat filler Width intervals in order that any top width fillers may bepossible; and for thus limiting the extension of the pedestal at suchfiller-width steps, it is convenient to take advantage of the customaryslides by which the pedestal and top members are connected forextension, which comprise, as is well understood, slides 20, 2O attachedto one pedestal member, engaging and' moving alongside of slides 21, 21,attached to the other pedestal member. For that purpose the adjacentvertical surfaces of slides 2O and 21 are provided with notches 22, 22,in position for registering with each other, so as to receive the hooknose 24, of the hook 25, such hook nose extending across the meetingplane of the two slides to engage both registered notches, the hookbeing pivoted to either one of the slides which is recessed at the topto accommodate thehook as seen in Fig. 2, the sides of the recess 26,being cut away at 27, to admit the fingers of the operator to reach thehook.

The locked position of the body of the hook V6, is evidently invariable,and this would tend, if no preventative means were employed to render itsometimes impossible to lock the table on account of the swelling whichthe top members and fillers Awill experience from changes of temperatureand moisture. On the other hand it sometimes would tend to make itimpossible to lock the table tightly on account of the shrinkage of thetop members and fillers by drying out. This difficulty is, of course,multiplied by the number of fillers which are inserted, presuming thatthey are. liable to swelling and shrinking, so that the total change tobe accommodated is the sum of the change of all sections; and it isespecially important to meet this difliculty in a table in which therange of extensibility comprises not only the range of movement on thetop members on the pedestal, but also the range of extension of thepedestal halves.

To accommodate this variation due to swell-l ing and shrinking, any oneor more of the elements concerned in drawing the parts of the tabletogether may be made yielding. The entire train of connection, it willbe observed, comprises both plates 13 and 14:, both hooks 5 and 6 andalso the connections of the hook 6 with the lever 10. rPhe mostconvenient place for providing this yieldis in the hook 5, which isshown with a spring nose 5a, the hook being made of spring steel andother material suitably stiff and elastic folded in goose-neck form atthe end to form the hook. The gooseneck 5a, provides the necessaryelastic yielding. Either in addition to the yielding hook, or as analternative, either one of the plates 13, or 14, may be mountedyieldingly. The plate 111, is so shown, its flanges 15, having slots 15,through which the screws which secure it to the pedestal member 2, areentered for so securing' it, a spring :28, being lodged in the channelformed by the struck-up rib and interposed between the downwardly foldedend 14C, of the rib and a stop screw Q9, which is screwed into the topof the pedestal so as to extend up in the channel at proper position tothus stop the spring. Preferably this stop screw is of the form commonlyknown as a cornice hook, that is, having a right angle head which servesto engage and center the end of the spring. I claim 1. In an extensiontable, comprising a supporting member and top members, movable thereonfor extension, in combination with such supporting member and topmembers, engaging devices on the supporting member and coperatingengaging devices of the two vtop members respectively, relativelypositioned for engagement at intervals of extension equal to the unitfiller width, one of said engaging devices being mounted for movement.longitudinally of the table on the part by which it is carried fordrawing the table members together, one` of said engaging devicescomprising a spring, po-

sitioned therein for receiving the drawing pressure.

2. In an extension table comprising a supporting member-and top membersmovable relatively thereto for extension, the supporting member beingdivided and the parts being provided with slides by which they esobeeried for drawing the members together when such engaging devices areengaged, and one of such engaging devices comprising a spring positionedfor yielding to the drawing pressure.

3. In an extension table which comprises a supporting member and topmembers movable relatively thereto for extension to admit fillers, incombination with such supporting member and top members, engagingdevices on the supporting members cooperating and engaging devices onthe top members, one of such engaging devices being movablelongitudinally of the table on the member by which it is carried fordrawing the two members together when such devices are engaged, andmeans for so moving the movable engaging device and for locking it, oneof the engaging devices on the supporting member comprising a springpositioned for yielding to the drawing pressure.

4. In an extension table which comprises asupporting member and topmembers movable relatively thereto :t'oi extension to admit fillers, incombination with such supporting member and top member, hooks carried bythe top members respectively, and plates carried by the supportingmember having means for engaging the hooks positioned for suchengagement at closed position of the top members and at half fillerwidthv intervals outward therefrom; a slide to which one of the hooks ispivoted, and means for operating the same longitudinally of the tablefor drawing the hook longitudinally; one of the plates being mounted onthe supporting member for longitudinal movement, and a spring whichresists such movement outwardly.

In testimony whereof I have hereunto set my hand at Chicago, Illinois,this 11th day of October, 1909.

EMIL TYDEN.

Vitnesses:

C. J. CHRIs'rorinL, M. G. ADY.

